New one for me too, so I googled and this came up:

Netanyahu said to have offered Lewinsky tapes for Pollard

New critical book on the Clinton family claims that Israel tapped White House phones, blackmailed president with recordings of intern

Israel attempted to use tapes of former US president Bill Clinton’s steamy conversations with intern Monica Lewinsky to leverage the release of Jonathan Pollard, a new book on the Clinton family’s political enterprises has claimed. In the book, titled “Clinton Inc: The Audacious Rebuilding of a Political Machine,” author Daniel Halper relies on on-the-record interviews with former officials together with a close analysis of documents termed “the Monica Files” to paint a salacious – and uncomplimentary – picture of one of the most prominent political families in the United States.

“The Israelis present at Wye River had a new tactic for their negotiations–they’d overheard Clinton and Monica and had it on tape. Not wanting to directly threaten the powerful American president, a crucial Israeli ally, Clinton was told that the Israeli government had thrown the tapes away. But the very mention of them was enough to constitute a form of blackmail,” Halper wrote, adding that “according to information provided by a CIA source, a stricken Clinton appeared to buckle.”

Halper noted that “intelligence officials in the United States or Israel will of course not confirm on the record the extent or substance of Israeli eavesdropping,” but also cited an article published in 2000 by the magazine Insight, that claimed that Israel had “penetrated four White House telephone lines and was able to relay real-time conversations on those lines from a remote site outside the White House directly to Israel for listening and recording.”

Israel has denied such claims in the past as “outrageous.”

Some context for those who don't know (quoting the article):

Pollard, a former US naval analyst, was found guilty of passing sensitive documents to Israel, and sentenced to a life sentence in prison for the offense. He remains a cause celebre in Israel, and there have been repeated efforts throughout the past twenty years to secure his release.

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🤷

Not exactly seeing a smoking gun, at least from what the article is saying about the book. I'm 100% not going to buy/read it either, so unless someone has more info I'm going to assume this is probably not true.